There are 400 bars, pubs and clubs located in London's financial district, according to the City of London Corporation.

"Most people get a pint or two with their lunch, we get a lot of regulars coming in from the offices around us," said Victoria Szabo, a manager at Hamilton Hall, a historic pub frequented by bankers and office workers.

Szabo said she was not worried about the pub's business even if more companies ban workers from drinking during the day.

"They will just keep coming for drinks after work -- as they do now," she said.

@NikDarlington only people who actually work for lloyds....Not the UW's or Brokers 😏

A study by the City of London Substance Misuse Partnership found that finance workers are at an increased risk of health, social and work issues related to drinking.

The study also found that the financial services industry has the highest level of alcohol misuse of any employment sector, with up to 40% middle management and general office workers engaging in binge drinking two to three days each week.